Activation

my friend has had to reinstall XP home, (oem )when he tried to activate it by internet,microsoft said it had exceeded the number ofactivations aloud,and he should use another key.does that mean he must buy another disc ?

If he's installing it to the same PC it originally came with try the phone option click here :-"Activate Windows XP by phone

If you do not have a modem or an Internet connection, you can activate Windows XP by calling a Microsoft customer service representative. The Activation Wizard displays the toll free number that you can dial."

As long as he's not changed so many components that the system's changed beyond recognition, they'll probably give him a number.